How stable is your housing situation?
If it is possible to make long-term installations on your property, I think planting the mandarin tree outside and the flowers in a circle around it would be awesome, because then, fungal and
root associations could start to develop, as well. The plants would be able to talk with each other.
If it is not possible to make more permanent installations, I think whatever you can do will work! If they are in separate pots, I think the benefits of attracting beneficial insects and repelling pests will still happen, because I think those parts are more scent based . It's like the plants send out pheromones of some kind. I might be concerned about the plants crowding each other if they're sharing the same pots, so, if there is something you like to cook with that is highly aromatic, like basil, thyme, cilantro, parsley, or garlic, then, I think it could work having them in the same pots. Because, I think those plants grow pretty quick, so being around to harvest a little of them every couple to use in your cooking ought to keep the plants in check.